/Engine/Source/Runtime/InstallBundleManager/Public/InstallBundleUtils.h
Tracks a set of bundles and stats for a named session. This way you can have stats across multiple bundle installs grouped by some naming convention.
class FSessionPersistentStats : public [InstallBundleUtil::PersistentStats::FPersistentStatsBase](API\Runtime\InstallBundleManager\FPersistentStatsBase)